Device for blowing out oil-pipes.



G. M. TEW. DEVICE oR BLOWING OUT 01L PIPES.

APPLICATION FILED JAN. 17 I918.

-1,290,4 08. E Patented Jan. 7, 1919.

GeoryeM 72w W mm ' emotion is. raw, or KIRKLAND, wasnmeron.

i DEVICE FOR BLOWING OUT OIL-PIPES.

Specification of Letters ZPatent.

Patented Jan. 7, 1919.

Applicationflled J anuary 17, 1918. Serial No. 212,379.

To all whom it may concern:

Be it known-that I, GEORGE M. Tnw,'a citizen of the United States, and resident of Kirkland, county of King, and State of Washington, have invented certain new and useful Improvements in Devices for Blowing Out Oil-Pipes, of which the following is a specification.

My invention consists of a'device which may be appliedto pipes which are used for conveying oils or other liquids, which pipes might become clogged, eitherfrom-the oil becoming thick and viscous or by the deposit therein of foreign matter, by the use of which device air may be applied to blow out the pipes and clean them of any foreign matterwhich may 'have become lodged carrying it out have been illustrated inthe accompanying drawing and will be hereinafter described, and the particular parts and combinations of parts which constitute my invention will be defined in the claims appended to this specification.

Figure 1 is a section of my device taken lengthwise of the air supplying nozzle and in a plane extending across the pipe to which the device is attached.

Fig. 2 is an exterior view taken in line with the air supplying nozzle.

Figs. 3 and 4 are sections taken in the plane of the pipe and showing the nozzle in different positions.

Fi 5 is a view of an engine of the type wide y employed to drive automobiles showing the manner of applying my invention thereto. .7

In the oilin system of a popular car, a pipe 1 is emp oyed for conveying oilcolected by a funnel or apron upon which it is thrown by a moving part of-the machinery,'toparts of the machinery which require liberal oiling. The pipe '1 represents .such a pipe or any other pipe, which is used as a means for conveying oil orother liquid from one point to another.

At a convenient point in such a pipe it is cut and my device is inserted, the same mak ing it possible to apply air under pressure to blow out the pipe and to be able to cause this air to act in one direction only, whereby the pressure of the air may be effectively utilized to dislodge and remove all matter lodged in the pipe.

The device which is applied to the pipe has a T-shaped casing or body resembling a pipe T. The ends of the head of such casing are constructed to receive the ends of the pipe where it has been cut, this head end forming a part of the through channel of the pipe.

Where the thickness ofthe pipe 1 will permit, the connection may be by threaded joints, but inthe particular make of car re- 1 ferred to the walls of the pipe are too thin 75 r for this and their ends are therefore simply a tight fit within the casing 1. I prefer, in either case, to recess the casing, as shown at 21, so that the conduit surface through the casing is smooth and without shoulders.

The stem- 20, of the casing, is bored and has therein a plunger 3 which fits snugly but may be easilyreciprocated therein. A spring 4. bearing against the outer end face of the stem 20 and a collar 30 on the plunger 3, normally holds the plunger outward, or so that its inner end does not extend into or block the through passage in the head of the T 2. Conveniently, a cap 5, is screwed to j upon the-stem 20 and forms a guide for the outer end of the plunger 3, as well as retaining it in place. Q

The plunger 3 has a central or axial bore 31 which has a side discharge aopening'32 at its inner end. This member thus forms an air discharging nozzle which may be placed in free communication with the pipe 1 by pushing it inward. It is evident that the supply of air to the pigs may be limited to one end only, this end e by that toward which the opening 32 faces.

ing determined It maybe freely'turned to face in anydirection.

To insure accurate facing when pressed inward I may-provide the head of the ca 5 with notches 50. and thefplunger 8 wit a short rib 85, which is adapted toentervto prevent separation of the The outer end of the plunger or air supplying nozzle '3 is threaded, as shown at 34, ithis being preferably of the same size and threads as the tire n1pples,so that the same attachment as is used to connect an air pump or air supply hose' with the tire may be used to connect with the plunger or nozzle 3. A protective'cap 33 should ordinarily cover this end.

I have shown a wire 6 as one part of the pipe '1 and secured to a clamp ring which is secured to the other part. This or other means may be employed pipe sections.

In using my-device the cap 34 is removed, the air hose applied to the nozzle or plunger 3 and it is pushed inward. It cannot be pushed inward except when the rib 35 enters one of the notches 50, in which position the discharge opening? is facing toward one end of the pi e. on the'air is turned on, it will clear t is end of the pipe. By drawing the nozzle outward, turnin around and then pressing it 1n, the other end of the ipe may be blown out.

What I c aim as my invention is:

1. The combination with an oil feed pipe of a hollow T fitting adapted to be connected in said pipe between its ends 4a hollow plug fitting t e stem of said. T an adapted when pushed inward to close theioil flew channel,

said plug;l normally being heldout' of the oil-flow c anncl and having a side discharge adapted to registerwith said .oil flow channel when the plug is pushed. in! v 2. A means for blowingoutpi com-- r I ad prising a casing having a ,tubula apted to have its head inserted insaid pipe and a t e stem of plu vmounted to reciprocate in the" 1 and having an axial 'bore with a lateral d scharge adapted to',register with passing about it halfway 3. A means for blowing out pipes comprising a T coupling adapted to have its head inserted in the pipe, astem mounted to turn and, reciprocate in the stem of the coupling and to close the passage through the head when pushed thereinto, said stem having a bore extending from its outer end and a discharge port at one side in' a position to communicate with the head when pushed inward, means for normally withdrawing said stem to thereby close said discharge port, said stem being at its outer end'adaptv ed for connection thereto of anair supply ipe, said stem and the stem of the coupling elng provided with members engageable when t e stem is pushed inward to prevent rotation and to insure registration of its discharge port with the passage in the head.

4. A means for blowing out pipes compling and having a bore extending from its outer end to a side discharge port near its inner end in position to register with the passages of the head when the lunger is pushed inward, a spring surro'un ing said lunger and engaging the stem of the coupling, the plunger having a collar engaging. the outer end of the spring, a cap inclosing said spring and secured to the coupling, the headof this cap being notched and the plungerzhaving a rib normally without the cap and recip-v rocable within the notches in the cap to insure registration of the air discharge port with the'passages in the head. 1 i

rising a T-shaped coupling adapted to ave its-head inserted in the pipe to form Signed in Seattle, Wsshingas;;.this 2nd" day of January, 1918. g I GEORGEM. we. 

